<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script src="vue.js" type="text/javascript"></script>
    <script src="vue-resource.js" type="text/javascript"></script>
</head>
<body>

<div id="box">
    {{{msg}}}
    <span v-html="msg"></span>
</div>

<script>
    new Vue({
        el:'#box',
        data:{
            msg:'<strong>well</strong>'
        }
    });
</script>
</body>
</html>